Split file number under compression?

[Chrissy]

In compression, what does this mean? I tried a general search. I did not find any answers. I am used to being able to split by number of files, but what does this option indicate and what values are expected?
I apologize for my ignorance. Backup is not something that I am used to doing outside of the Windows or Symantec utilities.

[Adrian (Softland)]

Hi,
That split option is to split the resulting zip files by the number of source files included in each archive.

For large number of files, you can split the zip files in order to include each one only 100,000 files.